diff options
| author | Dhananjay Phadke <dhananjay@netxen.com> | 2009-08-24 23:23:26 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-08-27 02:29:17 +0400 |
| commit | c9517e5893db03ca8bd32b8783b39af58176947c (patch) | |
| tree | 5ae4d26af6f38e70a868e634d0576056c326027e /drivers/net/netxen/netxen_nic_hw.c | |
| parent | cb7e4b6e37144f5d131ee09296be3c21c41f28d8 (diff) | |
| download | linux-c9517e5893db03ca8bd32b8783b39af58176947c.tar.xz | |
netxen: implement generic pcie semaphore functions
Implement common function for locking/unlocking 8 hardware
semaphores used for serializing access to shared resouces
on a NIC board by different PCI functions.
As by definition, callers of these semaphore API can be
put to sleep till the semaphore is locked.
Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/netxen/netxen_nic_hw.c')
| -rw-r--r-- | drivers/net/netxen/netxen_nic_hw.c | 57 |
1 files changed, 29 insertions, 28 deletions
diff --git a/drivers/net/netxen/netxen_nic_hw.c b/drivers/net/netxen/netxen_nic_hw.c index 9138bbcbb80a..cbfe44c8a7fd 100644 --- a/drivers/net/netxen/netxen_nic_hw.c +++ b/drivers/net/netxen/netxen_nic_hw.c @@ -86,7 +86,6 @@ static void __iomem *pci_base_offset(struct netxen_adapter *adapter, return NULL; } -#define CRB_WIN_LOCK_TIMEOUT 100000000 static crb_128M_2M_block_map_t crb_128M_2M_map[64] __cacheline_aligned_in_smp = { {{{0, 0, 0, 0} } }, /* 0: PCI */ @@ -320,6 +319,35 @@ static unsigned crb_hub_agt[64] = #define NETXEN_WINDOW_ONE 0x2000000 /*CRB Window: bit 25 of CRB address */ +#define NETXEN_PCIE_SEM_TIMEOUT 10000 + +int +netxen_pcie_sem_lock(struct netxen_adapter *adapter, int sem, u32 id_reg) +{ + int done = 0, timeout = 0; + + while (!done) { + done = NXRD32(adapter, NETXEN_PCIE_REG(PCIE_SEM_LOCK(sem))); + if (done == 1) + break; + if (++timeout >= NETXEN_PCIE_SEM_TIMEOUT) + return -1; + msleep(1); + } + + if (id_reg) + NXWR32(adapter, id_reg, adapter->portnum); + + return 0; +} + +void +netxen_pcie_sem_unlock(struct netxen_adapter *adapter, int sem) +{ + int val; + val = NXRD32(adapter, NETXEN_PCIE_REG(PCIE_SEM_UNLOCK(sem))); +} + #define NETXEN_UNICAST_ADDR(port, index) \ (NETXEN_UNICAST_ADDR_BASE+(port*32)+(index*8)) #define NETXEN_MCAST_ADDR(port, index) \ @@ -906,33 +934,6 @@ int netxen_p3_get_mac_addr(struct netxen_adapter *adapter, __le64 *mac) return 0; } -#define CRB_WIN_LOCK_TIMEOUT 100000000 - -static int crb_win_lock(struct netxen_adapter *adapter) -{ - int done = 0, timeout = 0; - - while (!done) { - /* acquire semaphore3 from PCI HW block */ - done = NXRD32(adapter, NETXEN_PCIE_REG(PCIE_SEM7_LOCK)); - if (done == 1) - break; - if (timeout >= CRB_WIN_LOCK_TIMEOUT) - return -1; - timeout++; - udelay(1); - } - NXWR32(adapter, NETXEN_CRB_WIN_LOCK_ID, adapter->portnum); - return 0; -} - -static void crb_win_unlock(struct netxen_adapter *adapter) -{ - int val; - - val = NXRD32(adapter, NETXEN_PCIE_REG(PCIE_SEM7_UNLOCK)); -} - /* * Changes the CRB window to the specified window. */ |